Guess it determines on a number of various factors... maybe the best thing to do is have your dealer look at it during your next "pit stop". I have about 10,500 miles on my bike now, and have a "thumbs up" from my dealer that I have no issues and my valves are running perfectly fine. I have not had my valves changed or adjusted either. - Side note just in case you ask: I run 87 octane gas, Synthetic/Petro blend for my oil and "other" spark plugs that Honda recommends for long highway running, P/N **** 07 (the spark plugs that run cooler, can't remember the exact P/N at this time).
But again, just get a check up @ your local dealer shop and find out for sure if any of you have any issues. I found that the pinging sound is fairly typical for this bike the first few thousand miles and calms down after the second "non-starter" oil change and maintenance at around 8k miles. Again, a quick dealer check up may be in order.
Also Honda says the pinging will be a typical thing that will happen with this bike under continuous loads, and if it does not go away (or get's deafeningly louder) after given time to adequately cool down or the load lessens, then you should have your dealer check out the vehicle to check spark plugs and also other issues that may have arisen such as excessive oil wear.
Hope this helps some of you.
